let decimalInteger = 17
let binaryInteger = 0b10001             // 17 in binary notation
let octalInteger = 0o21                 // 17 in octal notation
let hexadecimalInteger = 0x11           // 17 in hexadecimal notation
let decimalInteger = 123_456_789
let separatedBinaryInteger = 0b10_001
let separatedOctalInteger = 0o21_17
let separatedHexadecimalInteger = 0x1a_f1
let pi = 3.141592
let exponential = 1.21875e1
let exponential2 = 1.21875e+1
